I've never used uMatrix what can uMatrix do what uBlock can't? I have set all sites to no js, and if something does not work I click the JS toggle in the menu, reload the page and thats it.
And yes uMatrix should work on Firefox on Android. ( At least it is installable)
uMatrix has a spreadsheet like matrix of features and sites. It's immediately clear what happens when I click a cell, a column or a row. With uBO I don't even understand where to click to toggle JS for one of the sites a page got scripts from. I learned it years ago but it was too cumbersome. I kept using uMatrix and I forgot it. I attempted to use it again now and I couldn't find anything. I didn't google for it.
I installed uMatrix on my phone and disabled NoScript. Of course I keep using uBO for filtering out ads and hiding annoying parts of sites with the element picker.
And yes uMatrix should work on Firefox on Android. ( At least it is installable)